#include "MySQL.hpp"
#include "user.hxx"
#include "user-odb.hxx"


// 新增用户信息  信息修改  通过昵称获取用户信息  通过手机号获取用户信息
// 通过用户id获取用户信息  通过多用户id获取多用户信息 
namespace lcl
{
    class UserTable
    {
    public:
        using ptr = std::shared_ptr<UserTable>;
        UserTable(const std::shared_ptr<odb::core::database> &db) : _db(db) {}
        bool insert(const std::shared_ptr<User> &user)
        {
            try
            {
                // 获取事务对象，开启事务
                odb::transaction trans(_db->begin());
                // 数据新增
                _db->persist(*user);
                // 提交事务
                trans.commit();
            }
            catch (std::exception &e)
            {
                LOG_ERROR("新增用户失败 {}:{}！", user->nickname(), e.what());
                return false;
            }
            return true;
        }
        bool update(const std::shared_ptr<User> &user)
        {
            try
            {
                odb::transaction trans(_db->begin());
                // 数据更新
                _db->update(*user);
                trans.commit();
            }
            catch (std::exception &e)
            {
                LOG_ERROR("更新用户失败 {}:{}！", user->nickname(), e.what());
                return false;
            }
            return true;
        }
        std::shared_ptr<User> select_by_nickname(const std::string &nickname)
        {
            std::shared_ptr<User> res;
            try
            {
                odb::transaction trans(_db->begin());
                typedef odb::query<User> query;
                typedef odb::result<User> result;
                // SELECT * FROM user WHERE nickname = '输入的目标昵称' LIMIT 1; 然后赋值给res
                res.reset(_db->query_one<User>(query::nickname == nickname));
                trans.commit();
            }
            catch (std::exception &e)
            {
                LOG_ERROR("通过昵称查询用户失败 {}:{}！", nickname, e.what());
            }
            return res;
        }
        std::shared_ptr<User> select_by_phone(const std::string &phone)
        {
            std::shared_ptr<User> res;
            try
            {
                odb::transaction trans(_db->begin());
                typedef odb::query<User> query;
                typedef odb::result<User> result;
                res.reset(_db->query_one<User>(query::phone == phone));
                trans.commit();
            }
            catch (std::exception &e)
            {
                LOG_ERROR("通过手机号查询用户失败 {}:{}！", phone, e.what());
            }
            return res;
        }
        std::shared_ptr<User> select_by_id(const std::string &user_id)
        {
            std::shared_ptr<User> res;
            try
            {
                odb::transaction trans(_db->begin());
                typedef odb::query<User> query;
                typedef odb::result<User> result;
                res.reset(_db->query_one<User>(query::user_id == user_id));
                trans.commit();
            }
            catch (std::exception &e)
            {
                LOG_ERROR("通过用户ID查询用户失败 {}:{}！", user_id, e.what());
            }
            return res;
        }
        std::vector<User> select_multi_users(const std::vector<std::string> &id_list)
        {
            // select * from user where id in ('id1', 'id2', ...)
            if (id_list.empty())
            {
                return std::vector<User>();
            }
            std::vector<User> res;
            try
            {
                odb::transaction trans(_db->begin());

                typedef odb::query<User> query;
                typedef odb::result<User> result;
                std::stringstream ss;
                ss << "user_id in (";
                for (const auto &id : id_list)
                {
                    ss << "'" << id << "',";
                }
                std::string condition = ss.str();
                condition.pop_back();
                condition += ")";
                // condition 为 user_id in ('id1','id2',...)
                // 将查询结果集存储到 result 类型对象中。
                result r(_db->query<User>(condition));
                for (result::iterator i(r.begin()); i != r.end(); ++i)
                {
                    // *i就是一个User对象
                    res.push_back(*i);
                }

                trans.commit();
            }
            catch (std::exception &e)
            {
                LOG_ERROR("通过用户ID批量查询用户失败:{}！", e.what());
            }
            return res;
        }

    private:
        std::shared_ptr<odb::core::database> _db;
    };
}